package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @author: HuangQi
 * @date: Created in 0:13 2023/9/9
 * @description: 订单业务层实现类
 */

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Autowired
    private Userservice userservice;

    @Autowired
    private AddressBookService addressBookService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders order) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userId);

        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);

        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomException("购物车中没有商品,不能下单");
        }

        //根据用户id查询用户信息
        User user = userservice.getById(userId);
        //log.info("用户信息:{}", user);

        //根据地址id查询地址信息
        AddressBook addressBook = addressBookService.getById(order.getAddressBookId());
        if (addressBook == null) {
            throw new CustomException("用户地址信息有误,不能下单");
        }

        long orderId = IdWorker.getId(); //订单号
        //计算总金额
        AtomicInteger amount = new AtomicInteger(0);

        //将购物车中的数据转换成订单详情数据
        List<OrderDetail> orderDetails = shoppingCartList.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //完成下单
        //向订单表中插入一条数据
        order.setId(orderId);
        order.setOrderTime(LocalDateTime.now());
        order.setCheckoutTime(LocalDateTime.now());
        order.setStatus(2);
        order.setAmount(new BigDecimal(amount.get())); //总金额
        order.setUserId(userId);
        order.setNumber(String.valueOf(orderId));
        order.setUserName(user.getName());
        order.setConsignee(addressBook.getConsignee());
        order.setPhone(user.getPhone());
        order.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName()) +
                (addressBook.getCityName() == null ? "" : addressBook.getCityName()) +
                (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName()) +
                (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(order);

        //向订单详情表中插入多条数据
        orderDetailService.saveBatch(orderDetails);

        //删除购物车中的数据
        shoppingCartService.remove(queryWrapper);
    }
}
